Malicious PDF — malware analysis report

Static analysis result for SHA-256 485811ea9a104020…

MALICIOUS

PDF

56.8 KB Created: 2020-11-03 03:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 31a6df1baa5acd093d0c162585ac506a SHA-1: 1974429ef0bf364df23e288743dc555acaffb3d9 SHA-256: 485811ea9a104020e014b23b134e6748b97a9a3d7e4258e517fd03568a61174b
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for free movie streaming, which is a common tactic for driving traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=it+chapter+2+free+online+m4ufree In PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/risamusabuw.pdfIn PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/zadenub.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/sunogawo_xifenosa_fuvomovonerefi_badawezaliromi.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/2990130.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/pokizujopasese_zuvubafixuzube.pdfIn PDF document text
    • https://masagepa.weebly.com/uploads/1/3/4/0/134096256/854c7f7a5f0.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/ce5e05a092f52f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f959a5287bdb.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/7704732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eb769a-3d34-4112-82f3-fc6600333eef/download_trinity_rescue_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5838af60-9d2b-492c-95fd-dbabccf4453a/63269799492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c8f326-f248-405c-9411-cc08dfa38418/graficas_de_gantt_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad6d1c8-827b-4380-8fd7-88f18580bd4b/tugobutapina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5427dd-5a1c-4f8f-bc95-82adb363e43e/movexuxefute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866cd4d8-f8d3-451a-a5a3-62f4923d22c7/90130967943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dc703d-2bdc-4ba9-95af-2500740c677d/rust_entity.spawn_list.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 5236 bytes
SHA-256: 94a579451c63d320822fd49cd85b6d59d22cf181ec78a51ec1328cf5023c0717
font_01_sfnt_off0000af29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF29 11428 bytes
SHA-256: 143acdf130f352bec80359e815dc208d6227a9af1d5f6ae7caa37e7c9c4c16ec

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